Difference between revisions of "IAC LeadTunstateCherenkovCrystalTests 2-15"
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[[File:CalNearBP_021715-9.52.png| 200 px]][[File:CalRearBP_021715-9.52.png| 200 px]] | [[File:CalNearBP_021715-9.52.png| 200 px]][[File:CalRearBP_021715-9.52.png| 200 px]] | ||
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| + | =2/20/15= | ||
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| + | [[File:NearBP_022015-7.35.png| 200 px]][[File:NearBP_022015-7.47.png| 200 px]][[File:RearBP_022015-7.47.png| 200 px]] | ||
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| + | =Root script= | ||
The Image2Hist.C program from the ROOT tutorials | The Image2Hist.C program from the ROOT tutorials | ||
Latest revision as of 16:29, 20 February 2015
2/17/15
Beam profile measurements using glass plates separated by 40.4 cm
- After calibrating .
2/20/15
Root script
The Image2Hist.C program from the ROOT tutorials
//Create a 2-D histogram from an image.
//Author: Olivier Couet
void image2hist()
{
// TASImage image("rose512.jpg");
TASImage image("test.png");
UInt_t yPixels = image.GetHeight();
UInt_t xPixels = image.GetWidth();
UInt_t *argb = image.GetArgbArray();
TH2D* BeamShape = new TH2D("BeamShape","BeamShape",xPixels,-1,1,yPixels,-1,1);
for (int row=0; row<xPixels; ++row) {
for (int col=0; col<yPixels; ++col) {
int index = col*xPixels+row;
float grey = float(argb[index]&0xff)/256;
BeamShape->SetBinContent(row+1,yPixels-col,grey);
}
}
gStyle->SetPalette(53);
BeamShape->Draw("colz");
}